Issued: Mar 23rd, 2023 4:00PM
The alpine rating is Deep Persistent Slabs., the treeline rating is , and the below treeline rating is Known problems include
A stronger and deeper snowpack exists in the Yoho zone. Pay attention to shallower areas where the potential to trigger the deeper weak layers is more likely.
Wet loose avalanches up to size 2 have been reported out of steep solar aspects on Wed and Thur. On Tuesday, there was a deep persistent slab reported on Observation peak and Sunshine patrol reported observing two size 2.5 deep slabs in the surrounding backcountry.
Surface sun crusts exist on solar aspects to near ridgetops and up to 2000 m on shady aspects. The mid and lower snowpack is stronger and more settled in this region due to the deeper snowpack, but continue to pay attention to shallower areas that will display a weaker snowpack.
Friday - A trough of low pressure over the Alberta Rockies will produce cloudy skies and scattered flurries that will increase through the afternoon. Accumulations in the 1-5 cm range. Ridge-top winds will be light and the freezing levels only expected to rise to 1300 m.
Terrain and Travel Advice
- Uncertainty is best managed through conservative terrain choices at this time.
- Avoid thin areas like rock outcroppings where you're most likely to trigger avalanches failing on deep weak layers.
Deep Persistent Slabs
In the deeper snowpack areas of this region the Deep Persistent Problem is becoming less of a concern, but continue to pay attention to this layer in areas where the snowpack is shallower (such as moraines or wind scoured areas).
Aspects: All aspects.
Elevations: All elevations.
Valid until: Mar 24th, 2023 4:00PM